''I'm not a nut. ... I hope to have a working mockup and start experiments this fall,''

"working mockup"??

Actually, it looks interesting, and is if it might work.

I wonder about a couple of things. One, having the past and present neutrons side by side, rather than looking at the past neutron. If one is to "see" both of them, wouldn't one have to "have" two of them?

Second, regarding it as just an engineering problem to send humans back in time. It seems to me to be a whole lot harder to throw a coherent stack of baseballs through a wall than to throw a baseball through the same wall.

A person, or fly, or onion, is a lot more than a bunch of protons, neutrons and electrons, and there's a lot of relationships which would have to be preserved or information which which would have to be transmitted.

Interesting experiment he has, though. It will be interesting to see if he can do it. Would answer some questions.

Arf